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Indianapolis (/ˌɪndiəˈnæpəlɪs/), colloquially known as Indy, is the state capital and most populous city of the U.S. state of Indiana and the seat of Marion County. According to the U.S. Census Bureau, the consolidated population of Indianapolis and Marion County was 977,203 in 2020. The "balance" population, which excludes semi-autonomous municipalities in Marion County, was 887,642. It is the 15th most populous city in the U.S., the third-most populous city in the Midwest, after Chicago and Columbus, Ohio, and the fourth-most populous state capital after Phoenix, Arizona, Austin, Texas, and Columbus. The Indianapolis metropolitan area is the 33rd most populous metropolitan statistical area in the U.S., with 2,111,040 residents. Its combined statistical area ranks 28th, with a population of 2,431,361. Indianapolis covers 368 square miles (950 km2), making it the 18th largest city by land area in the U.S.

Indigenous peoples inhabited the area dating to as early as 10,000 BC. In 1818, the Lenape relinquished their tribal lands in the Treaty of St. Mary's. In 1821, Indianapolis was founded as a planned city for the new seat of Indiana's state government. The city was platted by Alexander Ralston and Elias Pym Fordham on a 1-square-mile (2.6 km2) grid next to the White River. Completion of the National and Michigan roads and arrival of rail later solidified the city's position as a manufacturing and transportation hub. Two of the city's nicknames reflect its historical ties to transportation—the "Crossroads of America" and "Railroad City". Since the 1970 city-county consolidation, known as Unigov, local government administration operates under the direction of an elected 25-member city-county council headed by the mayor.

Indianapolis anchors the 29th largest economic region in the U.S., based primarily on the industries of trade, transportation, and utilities; professional and business services; education and health services; government; leisure and hospitality; and manufacturing. The city has notable niche markets in amateur sports and auto racing. The city is home to three Fortune 500 companies, two major league sports clubs (Colts and Pacers), five university campuses, and several museums, including the world's largest children's museum. However, the city is perhaps best known for annually hosting the world's largest single-day sporting event, the Indianapolis 500. Among the city's historic sites and districts, Indianapolis is home to the largest collection of monuments dedicated to veterans and war casualties in the U.S. outside of Washington, D.C.

Tianxin District, which belongs to Changsha City, Hunan Province, is the seat of Hunan Provincial Government and is located in the south of the main urban area of Changsha City. Tianxin District faces Kaifu District in the north, Xiangtan City in the south, Yuhua District in the east and Xiangjiang River in the west. Tianxin District has a total area of 141square kilometers and has jurisdiction over 14 streets. In 2016, there were 460200 registered residents and 643400 permanent residents. The terrain is undulating, the terrain is low in north and south, high in the middle, slightly inclined from east to west, flat in the west, hilly in the middle; the climate has the characteristics of four distinct seasons, changeable spring temperature, sunny summer and autumn, short severe winter and long summer heat period. Tianxin District, named after Tianxin Ancient Pavilion, is the main birthplace of Changsha, with a history of more than 3,000 years. Tianxin District gathers 60% of the historical and cultural scenic spots in Changsha, which is known as "culture everywhere, eyes full of history".
Airport In Tianxin District - Changsha Huanghua International Airport
Changsha Huanghua International Airport (Changsha Huanghua International Airport, IATA: CSX, ICAO: ZGHA, CAAC: HHA), located at No. 1 Airport City, Huanghua Town, Changsha County, Changsha City, Hunan Province, China, 23.5 kilometers west of Changsha city center, 4E It is a first-class international airport, one of the twelve major trunk line airports in China, an airport with international scheduled flights, a first-class air port open to the outside world, one of the top ten regional international aviation hubs in China, the gateway airport of China (Hunan) Free Trade Pilot Zone, Hunan Airlines Main operating base        .
On June 25, 1986, the construction of Changsha Huanghua Airport started   ; On August 29, 1989, Changsha Huanghua Airport was officially opened, and Changsha Datuopu Airport was converted into a military airport; in 1993, Changsha Huanghua Airport was officially renamed Changsha Huanghua International Airport; on July 19, 2011, Changsha Huanghua International Airport T2 Terminal opened   ; On January 1, 2016, Changsha Huanghua International Airport implemented a 72-hour visa-free transit policy for foreigners   ; On March 30, 2017, the second runway of Changsha Huanghua International Airport was opened; on May 16, 2018, the T1 terminal of Changsha Huanghua International Airport was reopened   .
As of July 2021, Changsha Huanghua International Airport has 2 terminals, of which the T1 terminal covers an area of ​​53,000 square meters, the T2 terminal covers an area of ​​213,000 square meters, and the total area of ​​4 air cargo terminals is 82,471 square meters; There are 87 aircraft positions on the civil aviation station, 32 of which are close to the aircraft; there are 2 short-distance runways, the first runway is 3,200 meters long and 45 meters wide, and the second runway is 3,800 meters long and 60 meters wide; it can meet the annual passenger throughput 35 million passengers, 440,000 tons of cargo and mail throughput, and 244,000 aircraft takeoffs and landings           .
In 2021, Changsha Huanghua International Airport will handle a total of 19,983,064 passengers, a year-on-year increase of 3.9%, ranking 12th in the country; cargo and mail throughput will be 209,074.5 tons, a year-on-year increase of 8.9%, ranking 16th in the country; aircraft movements will reach 162,977 Flights, a year-on-year increase of 4.3%, ranking 15th in the country   .
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